Clearwater. 1 Encyonema neogracile (6277) 2 Encyonema hebridicum (6273) 3 Encyonema fogedii (6279) 4 Encyonema minutum (6277) 5–10 Gomphonema micropus (6281) 11 Gomphonema duplipunctatum (6277) 12–15 Gomphonema brebissonii (6276, 6277) 16–20 Gomphonema distans (6279) 21 Gomphonema parvulum (6277) 22, 23 Gomphonema auritum (6276, 6277) 24–28 Gomphonema subclavatum (6280) 29 Gomphonema insigniforme (6276) 30 Gomphonema sp. [cf. G. bukycanyonum PH] (6277). Scale bars: 10 µm.